Slough to Egham via Windsor Great Park Walk

Berkshire hourly weather (Open Meteo)

Sunset: 16:56. Dusk: 17:32. Dark: 18:12. Moon 25% (dusk to 22:26)

Updated: Mon, 20-Jan at 08:36

	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Today			0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
Tue, 21 Jan	0%	🌫 0%	🌫 0%	🌫 0%	🌫 0%	🌫 0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
Wed, 22 Jan	30%	🌫 32%	🌫 34%	🌫 33%	29%	24%	20%	20%	22%	23%	20%	16%	13%	11%	9%	8%
Thu, 23 Jan	3%	3%	4%	5%	6%	8%	10%	13%	18%	24%	28%	32%	33%	31%	26%	20%
Fri, 24 Jan	43%	48%	54%	59%	63%	67%	68%	67%	64%	60%	55%	51%	48%	46%	46%	45%
Sat, 25 Jan	54%	56%	59%	60%	62%	63%	63%	63%	62%	60%	58%	56%	54%	52%	49%	47%
Sun, 26 Jan	26%	24%	22%	21%	19%	18%	18%	18%	19%	20%	21%	23%	25%	27%	29%	32%
Mon, 27 Jan	53%	55%	58%	60%	62%	64%	65%	39%	41%	42%	39%	35%	32%	30%	30%	29%
Tue, 28 Jan	35%	35%	33%	32%	32%	31%	32%	35%	38%	39%	36%	31%	26%	22%	18%	16%
Wed, 29 Jan	26%	25%	26%	26%	26%	25%	26%	30%	36%	39%	36%	29%	23%	19%	15%	13%
Thu, 30 Jan	16%	17%	19%	21%	23%	25%	26%	27%	27%	27%	27%	26%	26%	25%	25%	24%
Fri, 31 Jan	26%	26%	25%	25%	24%	24%	23%	22%	21%	20%	19%	17%	16%	15%	13%	12%
Sat, 01 Feb	19%	20%	20%	20%	20%	20%	19%	17%	15%	13%	11%	8%	6%	5%	5%	5%
Sun, 02 Feb	🌫 3%	🌫 3%	🌫 4%	🌫 4%	5%	5%	6%	7%	9%	10%	11%	12%	13%	13%	13%	12%
Mon, 03 Feb	13%	14%	14%	15%	15%	16%	16%	16%	16%	16%	16%	16%	16%	16%	16%	16%
Tue, 04 Feb	13%	13%	12%	12%	12%	12%	13%	15%	18%	20%	22%	25%	26%	25%	24%	22%

Percentages are the chance of rain.

Weather data by Open-Meteo

Berkshire hourly weather (Met Office)

Sunset: 16:56. Dusk: 17:32. Dark: 18:12. Moon 25% (dusk to 22:26)

Updated: Sun, 02-Feb at 16:00

	06	09	12	15	18	21
Today					0%	0%
Mon, 03 Feb	10%	🌫 18%	🌫 18%	6%	5%	5%
Tue, 04 Feb	8%	9%	10%	57%	87%	9%
Wed, 05 Feb	1%	4%	5%	5%	4%	4%
Thu, 06 Feb	1%	2%	1%	1%	1%	1%
Fri, 07 Feb	🌫 14%	🌫 14%	4%	1%	1%	2%
Sat, 08 Feb	10%	10%	10%	12%	9%	10%
Sun, 09 Feb	12%	12%	10%	11%

Percentages are the chance of rain.

Weather data by Met Office

Regional weather (Met Office)

Sunset: 16:56. Dusk: 17:32. Dark: 18:12. Moon 25% (dusk to 22:26)

Updated: Sun, 02-Feb at 17:38

South East England

Tonight will see a sharp frost in places

• Largely clear skies at first, before clouding over from the west through the night
• A widespread frost likely, sharp across rural parts of Kent and Sussex, elsewhere turning a touch milder under increasing cloud
• Light winds
• Minimum Temperature -4C

Monday:

• A cloudy day on Monday with some patchy light rain possible in places during the afternoon
• Winds starting to pick up later
• Maximum Temperature 10C

Outlook for Tuesday to Thursday:

• Windy and cloudy Tuesday, rain later
• Dry and bright Wednesday and Thursday with light winds
• Overnight frosts becoming widespread by Thursday
• Temperatures around average, becoming colder later in the week

UK Day 6-7 and week 2

• High pressure will sit close to (and probably to the east of) the UK in this period
• Consequently, southern and eastern areas are likely to see the driest conditions, with lightest winds, which could lead to overnight frost and fog with temperatures a little below normal
• Further north and west, there is a risk of incursions of Atlantic air and fontal systems at times, which would bring some rain here, but with milder temperatures
• There is a very low chance that if the high orientates in such a way that a more easterly (rather than southerly/southeasterly) flow develops, a spell of much colder conditions could develop across the UK, with a risk of wintry showers in some parts

UK Week 3 and 4

• It is most likely that high pressure to the east or northeast of the UK will dominate at first in some form or another, but there is a weak signal for a more unsettled spell in the second half of the month, before signals become indistinguishable from climatology by the start of March
• Temperatures may be below average at first, with overnight frosts, but could return to near average or even rise a little above average later
• Precipitation amounts, are likely to be below average at first, though a few wintry showers are possible in the east, and perhaps some rain in the west, but amounts may return to near-normal later in the month

Weather data by Met Office

Berkshire Air Quality (Pollen and UV)

Updated: Sun, 02-Feb at 17:36

Key : Low Medium High Very High

Pollens

These pollens are shown (in season):

• Grass
• Alder and birch (trees)
• Mugwort and Ragweed (weeds)

When out walking, wraparound glasses, a disposable or washable facemask, and being at the front of the group, all help.

Other forecasts: Met Office, University of Worcester

UV and Air Quality

The UV forecast takes account of cloud cover.

"Air Q", the European Air Quality index, is a mix of dust/particulates, ozone, sulphur and nitrous oxides

Data

Weather data by Open-Meteo and CAMS ENSEMBLE

Berkshire Visibility

Updated: Mon, 20-Jan at 08:36

Visibility in km. Above 50km is 'good'. Humidity and air pollution make it worse. Theoretical maximum is 300km/200 miles in clean dry polar air.

On the South Downs, at ~ 170m/500ft, the horizon is is ~ 45km/30 miles away. On a mountain at 1,000m/3,000ft, it is ~ 160km/100 miles away. Formula: horizon in km = √ (13 x altitude in m)

Weather data by Open-Meteo

Berkshire daylight

Notes

• Max Height (solar noon) is when the sun is highest in the sky.
• Day length is dawn to dusk as there is enough light for walking for at least 30 minutes before sunrise and after sunset, even on an overcast day.
• At 'Light' (nautical dawn) the horizon becomes visible. At 'Dawn' (civil dawn) there is enough light to read, and drivers can switch their lights off. Finally the sun rises.
• After sunset, there is still enough light to read until 'Dusk' (civil dusk) or lighting up time for drivers. The horizon is still visible until 'Dark' (nautical dusk).
• Times will vary if there is a hill on the horizon.

Berkshire moonlight

Moonlight chart for walking at night.

Notes

• The percentage of the moon which is illuminated doesn't vary much with location.
• A full moon is not just bigger, it is much brighter. A quarter moon (1/2 disk visible) give less than 5% of the illumination of a full moon. You can walk with a quarter moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
• Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
• Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, (ii) if there are hills on the horizon, and (iii) if you are on a hill
• Sunlight is ~ 1,000,000 times brighter than moonlight.
• Of course, you need a cloudless night as well!

Berkshire weather (Accuweather)